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Updated: Jul 4, 2025

Growing a Cystic Fibrosis-Relevant Polymicrobial Biofilm to Probe Community Phenotypes
Published on: April 19, 2024
Novel Approaches to Multidrug-Resistant Infections in Cystic Fibrosis
Thomas S Murray1, Gail Stanley2, Jonathan L Koff3
1Department of Pediatrics, Section Infectious Diseases and Global Health, Yale University School of Medicine, PO Box 208064, 333 Cedar Street, New Haven, CT 06520-8064, USA.
Abstract:
Patients with cystic fibrosis (CF) often develop respiratory tract infections with pathogenic multidrug-resistant organisms (MDROs) such as methicillin-resistant Staphylococcus aureus, and a variety of gram-negative organisms that include Pseudomonas aeruginosa, Burkholderia sp., Stenotrophomonas maltophilia, Achromobacter xylosoxidans, and nontuberculous mycobacteria (NTM). Despite the introduction of new therapies to address underlying cystic fibrosis transmembrane conductance regulator (CFTR) dysfunction, MDRO infections remain a problem and novel antimicrobial interventions are still needed. Therapeutic approaches include improving the efficacy of existing drugs by adjusting the dose based on differences in CF patient pharmacokinetics/pharmacodynamics, the development of inhaled formulations to reduce systemic adverse events, and the use of newer beta-lactam/beta-lactamase combinations. Alternative innovative therapeutic approaches include the use of gallium and bacteriophages to treat MDRO pulmonary infections including those with extreme antibiotic resistance. However, additional clinical trials are required to determine the optimal dosing and efficacy of these different strategies and to identify patients with CF most likely to benefit from these new treatment options.
Insights
Cystic fibrosis patients face persistent multidrug-resistant organism infections. New therapies, including gallium and bacteriophages, show promise but require further clinical trials for optimal use.
Area of Science:
- Pulmonary Medicine
- Infectious Diseases
- Pharmacology
Background:
- Cystic fibrosis (CF) patients are susceptible to respiratory tract infections by multidrug-resistant organisms (MDROs).
- Despite advances in CFTR modulator therapies, MDRO infections remain a significant clinical challenge.
- Common CF pathogens include MRSA, Pseudomonas aeruginosa, and nontuberculous mycobacteria (NTM).
Purpose of the Study:
- To review current and emerging therapeutic strategies for managing MDRO pulmonary infections in CF patients.
- To highlight the need for novel antimicrobial interventions to combat antibiotic resistance in CF.
Main Methods:
- Review of existing literature on antimicrobial therapies for CF lung infections.
- Discussion of pharmacokinetic/pharmacodynamic adjustments, inhaled formulations, and beta-lactam/beta-lactamase combinations.
- Exploration of innovative approaches like gallium and bacteriophage therapy.
Main Results:
- Optimizing existing drug regimens and developing inhaled formulations are key strategies.
- Newer beta-lactam/beta-lactamase combinations offer improved efficacy.
- Gallium and bacteriophages represent promising alternative treatments for highly resistant infections.
Conclusions:
- Novel antimicrobial interventions are crucial for treating MDRO infections in CF.
- Further clinical trials are necessary to establish optimal dosing and efficacy of new strategies.
- Identifying CF patients who will benefit most from these emerging treatments is essential.
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